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[Karolis <985949@xxxxxxxxxxxxxxxxxx>]

To be honest, I never used 12.04.3, but I can grab the live CD and test
it, if you'd like.

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https://bugs.launchpad.net/bugs/985949

Title:
  Purple line appears on the external monitor after it is turned off and
  back on

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have an external LED monitor connected to my laptop via HDMI. When I
  first log in everything seems to be fine, but when the monitor turns
  off due to inactivity and then turns back on, I see 2 pixel wide
  purple line on the left side (photo attached).

  I got the same issue when I tried upgrading kernel to 3.2 in Ubuntu
  11.10

  The same happens in Unity 2D and 3D, so I don't think it's a Unity
  problem. It's probably either kernel or intel driver.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-23-generic 3.2.0-23.36
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic x86_64
  NonfreeKernelModules: wl
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  karolis   14155 F.... pulseaudio
   /dev/snd/controlC1:  karolis   14155 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf6dfc000 irq 46'
     Mixer name	: 'Silicon Image SiI1392 HDMI'
     Components	: 'HDA:83847616,1028020a,00100201 HDA:10951392,1028020a,00100000'
     Controls      : 33
     Simple ctrls  : 19
  Card1.Amixer.info:
   Card hw:1 'Headset'/'Logitech Logitech USB Headset at usb-0000:00:1d.7-1.4, full speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB046d:0a0b'
     Controls      : 6
     Simple ctrls  : 2
  Date: Fri Apr 20 00:19:10 2012
  HibernationDevice: RESUME=UUID=4626d6a9-26ae-4151-9855-e85315830484
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: Dell Inc. XPS M1330
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=e2c1bf72-7985-458c-af54-83144d4687d0 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-23-generic N/A
   linux-backports-modules-3.2.0-23-generic  N/A
   linux-firmware                            1.79
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-04-13 (6 days ago)
  dmi.bios.date: 12/26/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.name: 0N6705
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/26/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn0N6705:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: XPS M1330
  dmi.sys.vendor: Dell Inc.

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